From Abracadabra to Zombies
In a nutshell: A zombie is a mythical creature who is one of the walking dead. Zombies are not friendly and they don't like civilization.
A zombie is a character in stories and movies who is shown as a dead person brought back to life—though not to a full and independent life—by witchcraft or sorcery. In some stories, zombies are monsters who like to eat human flesh. Zombies are usually shown as sleepwalking slaves of whoever brings them back to life. Zombies like to destroy things. They don't like civilization. If you ever meet a zombie on the road—which you won't unless one jumps off a movie screen!—and she says "Hi. I'm a zombie and I'm here to help," don't believe her.